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Black holes do not exist—at least, not as we know them, says renowned physicist Stephen Hawking, potentially provoking a rethink of one of space’s most mysterious objects. A new study from Hawking also says that black holes may not possess “firewalls,” destructive belts of radiation that some researchers have proposed would incinerate anything that passes through them but others scientists deem an impossibility. The conventional view of black holes posits…

To begin with, the terms “hypergiant” and “supergiant” are both a bit general. For the most part, these terms are loosely used to refer to the largest and most luminous (brightest and thus most energetic) stars in the universe. The exact term that one should use depends on the specific star that one is discussing (its size and luminosity). There are yellow hypergiants, red supergiants, blue supergiants etc.). You don’t…

As a fan of Colossal Cave Adventure, I’m curious to know whether there’s an active volcano in this cave. Or at least a gold nugget room. Jonathan Sims catches up with me. Between us and the sunlit passage ahead stands a stalagmite that in profile resembles the paw of a dog. “The Hand of God would be just too corny,” he says, pointing at the formation. “But the Hand of…

Many people think classical music is going to enhance brain function (the Mozart effect) or playing particular games sharpens ones cognitive function. These theories have been looked at in detail and they don’t stand up. It is disappointing in a way, but what we have learned is that exercise is the key thing for brain function. Doing crosswords isn’t good for your brain? It is good for improving your crossword…

Can’t wait until we get this end-of-year state-mandated testing/evaluation over with, so my son can go back to reading stuff like this guy’s book. “Reality is structured to a series of moments so that anything that is real is real in a moment of time, and if something appears to persist in time, that’s because it’s continually renewing in time, in the moments of time, which are the reality of…